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Income Taxes (Schedule of Provision for Income Taxes Attributable to Income from Operations and Amount Computed by Applying Statutory Federal Income Tax Rate) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Oct. 31, 2014
Oct. 31, 2013
Oct. 31, 2012
Income Tax Disclosure [Abstract]      
Computed expected provision for taxes $ 103,787us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate $ 109,295us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate $ 96,408us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Income earned outside the United States subject to different tax rates (85,503)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential (97,002)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential (71,282)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential
State taxes, net of federal income tax benefit 525us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes 525us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes 294us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes
Effective Income Tax Rate Reconciliation Domestic Tax On Foreign Source Income 796coo_EffectiveIncomeTaxRateReconciliationDomesticTaxOnForeignSourceIncome 294coo_EffectiveIncomeTaxRateReconciliationDomesticTaxOnForeignSourceIncome 0coo_EffectiveIncomeTaxRateReconciliationDomesticTaxOnForeignSourceIncome
Research and development credit (126)us-gaap_IncomeTaxReconciliationTaxCreditsResearch (2,066)us-gaap_IncomeTaxReconciliationTaxCreditsResearch (131)us-gaap_IncomeTaxReconciliationTaxCreditsResearch
Incentive stock option compensation and non-deductible employee compensation 441us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost 371us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost 347us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
Tax accrual adjustment 3,786us-gaap_IncomeTaxReconciliationOtherReconcilingItems 2,854us-gaap_IncomeTaxReconciliationOtherReconcilingItems 665us-gaap_IncomeTaxReconciliationOtherReconcilingItems
Other, net 999us-gaap_IncomeTaxReconciliationOtherAdjustments 1,094us-gaap_IncomeTaxReconciliationOtherAdjustments 507us-gaap_IncomeTaxReconciliationOtherAdjustments
Income tax provision $ 24,705us-gaap_IncomeTaxExpenseBenefit $ 15,365us-gaap_IncomeTaxExpenseBenefit $ 26,808us-gaap_IncomeTaxExpenseBenefit